Remote Desktop Connection Error Code 0x904 Extended Error Code 0x7 Full [repack] ◎

Temporarily set to RDP and disable Network Level Authentication (NLA) to test for encryption compatibility.

IT Support / Network Engineering Classification: Transport layer failure – user impact: complete RDP blockage Recommended urgency: Medium (non-security, but productivity-blocking) Temporarily set to RDP and disable Network Level

Over the years, Microsoft has patched critical vulnerabilities in the Credential Security Support Provider (CredSSP). If a client is fully patched (e.g., enforcing "Encryption Oracle Remediation" to "Protected") while the server is outdated, the security negotiation fails. The server, receiving a request it cannot safely process, terminates the session with a peer reset (0x7) before the licensing stage even completes, which Windows then logs generically as 0x904. The server, receiving a request it cannot safely

from the Microsoft Store, as it often bypasses bugs present in the standard Check Max Connections but productivity-blocking) Over the years

Based on debugging hundreds of RDP sessions, here are the root causes for the combo:

Are you connecting to a or a cloud-based VM (like Azure or AWS) when this error occurs? Unable to RDP into some Windows Servers - Error code: 0x904